Red carpet rewind: Billboard Music Awards 1999

With the 2019 Billboard Music Awards just hours away, we're gearing up for epic performances by Taylor Swift, Ariana Grande and more. But first, we're taking a trip down memory lane and looking back on all of the hard-to-believe 1999 red carpet moments.

It's been 10 years since Jessica Simpson and Nick Lachey posed at the 1999 Billboard Music Awards as a couple, while NSYNC and the Backstreet Boys were at the peak of their boy band glory. And who could forget Kathy Girffin's waist-long hair?

From Britney Spears, to Mila Kunis, Christina Aguilera, Anne Hathaway and Mariah Carrey, you'll want to take a nostalgic look back at this epic gallery below. 

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The Billboard Music Awards 1999
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The Billboard Music Awards 1999
Britney Spears (Photo by Steve Granitz/WireImage)
LAS VEGAS - DECEMBER 8: Singer Nick Lachey of 98 Degrees and singer Jessica Simpson attend the 10th Annual Billboard Music Awards on December 8, 1999 at the MGM Grand Garden Arena in Las Vegas. (Photo by Ron Galella, Ltd./WireImage)
Kathy Griffin during The 10th Annual Billboard Music Awards at MGM Grand Hotel in Las Vegas, Nevada, United States. (Photo by Jim Smeal/WireImage)
Mandy Moore (Photo by Jim Smeal/WireImage)
(Original Caption) Arrival of the group N'Sync. (Photo by Frank Trapper/Corbis via Getty Images)
376318 01: 12/8/99 Las Vegas, NV. Backstreet Boys (winner - Album of the Year, Artist of the Year, Album Artist of the Year and Albums Artist Duo/Group of the Year) at the 1999 Billboard Music Awards. Photo by Brenda Chase Online USA, Inc.
Jennifer Lopez performing on the 1999 Billboard Music Awards at the MGM Grand Garden Arena in Las Vegas, 12/8/1999. Photo: Scott Gries/ImageDirect
Kathy Griffin during The 10th Annual Billboard Music Awards at MGM Grand Hotel in Las Vegas, Nevada, United States. (Photo by Jim Smeal/WireImage)
12/8/99 Las Vegas, NV. LeeAnn Rimes at the 1999 Billboard Music Awards. Photo by Brenda Chase Online USA, Inc.
Patti LaBelle during The 10th Annual Billboard Music Awards at MGM Grand Hotel in Las Vegas, Nevada, United States. (Photo by SGranitz/WireImage)
Mila Kunis (Photo by Ron Galella/WireImage)
374498 01: 12/8/99 Las Vegas, NV. Mariah Carey at the 1999 Billboard Music Awards. Photo by Brenda Chase Online USA, Inc.
(Original Caption) The singer Christina Aguilera. (Photo by Frank Trapper/Corbis via Getty Images)
Anne Hathaway (Photo by Jim Smeal/WireImage)
Mariah Carey and Patti Labelle during The 10th Annual Billboard Music Awards at MGM Grand Hotel in Las Vegas, Nevada, United States. (Photo by Jim Smeal/WireImage)
R. Kelly during The 10th Annual Billboard Music Awards at MGM Grand Hotel in Las Vegas, Nevada, United States. (Photo by SGranitz/WireImage)
(Original Caption) The actress Jennifer Love Hewitt. (Photo by Frank Trapper/Corbis via Getty Images)
LAS VEGAS - DECEMBER 8: Singer Jessica Simpson attends the 10th Annual Billboard Music Awards on December 8, 1999 at the MGM Grand Garden Arena in Las Vegas. (Photo by Ron Galella, Ltd./WireImage)
12/8/99 Las Vegas, NV. Ricky Martin at the 1999 Billboard Music Awards. Photo by Brenda Chase Online USA, Inc.
(Original Caption) Jay-Z with his award. (Photo by Frank Trapper/Corbis via Getty Images)
Britney Spears (Photo by Steve Granitz/WireImage)
12/8/99 Las Vegas, NV. Mike Tyson at the 1999 Billboard Music Awards. Photo by Brenda Chase Online USA, Inc.
12/8/99 Las Vegas, NV. Metallica at the 1999 Billboard Music Awards. Photo by Brenda Chase Online USA, Inc.
12/8/99 Las Vegas, NV. Aerosmith (Artist Achievement Award) at the 1999 Billboard Music Awards. Photo by Brenda Chase Online USA, Inc.
375574 01: 12/8/99 Las Vegas, NV. Red Hot Chili Peppers at the 1999 Billboard Music Awards. Photo by Brenda Chase Online USA, Inc.
Jennifer Lopez performing on the 1999 Billboard Music Awards at the MGM Grand Garden Arena in Las Vegas, 12/8/1999. Photo: Scott Gries/ImageDirect
Snoop Dogg during The 10th Annual Billboard Music Awards at MGM Grand Hotel in Las Vegas, Nevada, United States. (Photo by SGranitz/WireImage)
(Original Caption) Pop group 'Blink 182'. (Photo by Frank Trapper/Corbis via Getty Images)
R&B music group Blaque attends the 10th Annual Billboard Music Awards on December 8, 1999 at MGM Grand Garden Arena, MGM Grand Hotel and Casino in Las Vegas, Nevada. (Photo by Ron Galella, Ltd./WireImage)
Musician Brian McKnight attends the 10th Annual Billboard Music Awards on December 8, 1999 at MGM Grand Arena at MGM Grand Hotel and Casino in Las Vegas, Nevada. (Photo by Ron Galella, Ltd./WireImage)
(Original Caption) The singer Ricky Martin with his awards. (Photo by Frank Trapper/Corbis via Getty Images)
LAS VEGAS - DECEMBER 8: Athlete Thomas Hearns and wife Renee attend the 10th Annual Billboard Music Awards on December 8, 1999 at the MGM Grand Garden Arena in Las Vegas. (Photo by Ron Galella, Ltd./WireImage)
Singer Vitamin C attending 10th Annual Billboard Music Awards on December 8, 1999 at the MGM Grand Hotel and Casino in Las Vegas, California. (Photo by Ron Galella, Ltd./WireImage)
Athlete Mike Tyson attends 10th Annual Billboard Music Awards on December 8, 1999 at the MGM Grand Hotel and Casino in Las Vegas, Nevada. (Photo by Ron Galella, Ltd./WireImage)
Andrew Keegan during The 10th Annual Billboard Music Awards at MGM Grand Hotel in Las Vegas, Nevada, United States. (Photo by SGranitz/WireImage)
Mary J. Blige during The 10th Annual Billboard Music Awards at MGM Grand Hotel in Las Vegas, Nevada, United States. (Photo by SGranitz/WireImage)
8th December 1999: The pop band 98 degrees at the Billboard Music Awards, held at the MGM Grand Hotel and Casino in Las Vegas, Nevada. L-R: Nick Lackey, Justin Jeffre, Drew Lachey, and Jeff Timmons. (Photo by Scott Harrison/Hulton Archive/Getty Images)
Mariah Carey recieves the Artist of the Decade Award from Patty LaBelle on the 1999 Billboard Music Awards at the MGM Grand Garden Arena in Las Vegas, 12/8/1999. Photo: Scott Gries/ImageDirect
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